1. Initialization:

   • Libraries for the HX711 scale and the I2C LCD display are included.
   • Pins for the HX711 scale are defined.
   • Variables for weight measurements and calibration are declared.
   • A timestamp (lastTareTime) is set up to track the last time the scale was tared.
   • The interval for re-taring (TARE_INTERVAL) is set at 20 minutes.

2. Setup:

   • Serial communication is started for debugging purposes.
   • Relay pins are set as OUTPUT and initialized to a HIGH state (relays off).
   • The LCD display is initialized and a "Calibrating" message is displayed.
   • The scale undergoes a full calibration using the fullCalibration() function.
   • The time of the last tare operation is recorded.

3. Weight Measurement (measure_weight() function):

   • The scale reads the current weight.
   • The weight reading is adjusted using a calibration factor.
   • The adjusted weight is displayed on the LCD.

4. Full Calibration (fullCalibration() function):

   • A message indicating that the scale is undergoing full calibration is displayed on the LCD.
   • The scale is initialized, set with a known calibration factor, and tared.
   • A "Calibration Complete" message is displayed on the LCD.

5. Re-Taring (reTareScale() function):

   • The scale is quickly tared to account for any drift over time.
   • A "Re-Taring Complete" message is displayed on the LCD.

6. Main Loop:

   • The weight is continuously measured until it stabilizes (remains consistent for more than 600 milliseconds).
   • If the stabilized weight is within certain ranges, specific relays are activated for 350 milliseconds to presumably sort or handle the package based on its weight.
   • The code checks if 20 minutes have passed since the last tare operation. If so, the scale is re-tared using the reTareScale() function to ensure accuracy.